Liquid crystal display device and method of manufacturing the same

ABSTRACT

A first organic insulating film is arranged in a circumference area outside an active area on a first substrate. A circumference color filter is arranged in the circumference area on a second substrate. A second organic insulating film covers the circumference color filter. A seal material is arranged between the first and second organic insulating films to attach the first substrate and the second substrate. The seal material extends up to a position in which end portions of the first and second substrates overlap. A first spacer is arranged between the first and second organic insulating films in the circumference area. The first spacer is arranged on an active area side in the seal material. A second spacer is formed between the first and second organic insulating films in a position in which the end portions of the substrates overlap.

CROSS-REFERENCE TO RELATED APPLICATION

This application is a continuation of and claims the benefit of priorityunder 35 U.S.C. § 120 from U.S. application Ser. No. 16/029,716 filedJul. 9, 2018, which is a continuation of U.S. application Ser. No.15/283,741 filed Oct. 3, 2016 (now U.S. Pat. No. 10,042,212 issued Aug.7, 2018), which is a continuation of U.S. application Ser. No.14/245,386 filed Apr. 4, 2014 (now U.S. Pat. No. 9,488,870 issued Nov.8, 2016), and claims the benefit of priority under 35 U.S.C. § 119 fromJapanese Patent Application No. 2013-81070 filed Apr. 9, 2013, theentire contents of each of which are incorporated herein by reference.

FIELD

Embodiments described herein relate generally to a liquid crystaldisplay device and a method of manufacturing the same.

BACKGROUND

Liquid crystal display devices are widely used as typical displaydevices for various kinds of equipments. The liquid crystal displaypanel holding a liquid crystal layer between an array substrate and acounter substrate is manufactured using a large-sized mother substrate.That is, after manufacturing a plurality of liquid crystal displaypanels collectively, each liquid crystal display panel is obtained bycutting the mother substrate.

In recent years, a frame portion of the liquid crystal display panel,i.e., the width between an active area and a panel end tends to becomenarrow. More demand for the narrow frame is growing, more variations oflocation and width of a seal material to attach the array substrate andthe counter substrate are resulted depending on accuracy of the sealmaterial formation, and also variation of distance between a cut line ofthe mother substrate and an outer end of the seal material is easilyresulted. For this reason, there is a possibility that variation incutting accuracy may be caused due to the variation generated in theseal material.

On the other hand, a technology is proposed, in which a resin layer isarranged for banking seal material in the outside of seal formationareas, and respective pixels are cut down simultaneously from the mothersubstrate along the cut line provided between the adjacent resin layers.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are incorporated in and constitute aportion of the specification, illustrate embodiments of the invention,and together with the general description given above and the detaileddescription of the embodiments given below, serve to explain theprinciples of the invention.

FIG. 1 is a plan view schematically showing a display panel PNLapplicable to the liquid crystal display device according to anembodiment.

FIG. 2 is a cross-sectional view schematically showing a structure in acircumference area PRP of the display panel PNL taken along line A-Bshown in FIG. 1.

FIG. 3 is a view showing a layout of a seal material SE, a first spacerSP1 and a second spacer SP2 in the display panel PNL according to theembodiment.

FIG. 4 is a cross-sectional view schematically showing a cutting processfor cutting a pair of mother substrates according to the embodiment.

DETAILED DESCRIPTION

A liquid crystal display device and a method of manufacturing the sameaccording to an exemplary embodiment of the present invention will nowbe described with reference to the accompanying drawings wherein thesame or like reference numerals designate the same or correspondingportions throughout the several views.

According to one embodiment, a liquid crystal display device includes: afirst substrate including; a first insulating substrate, and a firstorganic insulating film arranged in a circumference area outside anactive area for displaying images, a second substrate including; asecond insulating substrate, a circumference shield layer arranged onthe second insulating substrate facing the first substrate in thecircumference area, a circumference color filter laminated on thecircumference shield layer in the circumference area, and a secondorganic insulating film covering the circumference color filter, a sealmaterial arranged between the first organic insulating film and thesecond organic insulating film to attach the first substrate and thesecond substrate, the seal material linearly extending up to a positionin which a first end portion of the first insulating substrate overlapswith a second end portion of the second insulating substrate; a firstspacer arranged between the first organic insulating film and the secondorganic insulating film in the circumference area, the first spacerbeing arranged on an active area side in the seal material; a secondspacer formed in a position in which the first end portion overlaps thesecond end portion and arranged between the first organic insulatingfilm and the second organic insulating film; and a liquid crystal layerheld inside surrounded with the seal material between the firstsubstrate and the second substrate.

According to other embodiment, a method of manufacturing a liquidcrystal display device, comprising the steps: preparing a first mothersubstrate having first and second display cells adjacent to each other,respectively including a first organic insulating film arranged in acircumference area outside an active area for displaying images,preparing a second mother substrate having the first and second displaycells, respectively including, a circumference shield layer arranged onthe second mother substrate in the circumference area, a circumferencecolor filter formed on the circumference shield layer in thecircumference area, and a second organic insulating film covering thecircumference color filter, forming a seal material arranged between thefirst organic insulating film and the second organic insulating film toattach the first mother substrate and the second mother substrate;forming a first spacer arranged between the first organic insulatingfilm and the second organic insulating film in the circumference area inthe first and the second display cells, the first spacer being arrangedon an active area side in the seal material; forming a second spacerstriding over a cutting line between the first and second display cellsand between the first organic insulating film and the second organicinsulating film; forming a liquid crystal layer held inside surroundedwith the seal material between the first mother substrate and the secondmother substrate, and cutting down the first and second mothersubstrates along the cutting line to separate the first display cell andthe second display cell, wherein the seal material is arranged betweenthe first organic insulating film and the second spacer or between thesecond organic insulating film and the second spacer.

FIG. 1 is a plan view schematically showing a display panel PNLapplicable to the liquid crystal display device according to anembodiment of the present invention.

The display panel PNL is formed of an active-matrix type liquid crystaldisplay panel, and equipped with a liquid crystal layer LQ held betweenan array substrate AR and a counter substrate CT facing the arraysubstrate AR. The array substrate AR and the counter substrate CT arepasted together by a seal material SE while a predetermined cell gap isformed between the substrates. In the illustrated example, the sealmaterial SE is formed in the shape of rectangular frame. The cell gap isformed of pillar-shaped spacers arranged in the array substrate AR orthe counter substrate CT. The liquid crystal layer LQ is held in thecell gap formed between the array substrate AR and the counter substrateCT, and surrounded with the seal material SE. The display panel PNL isequipped with an active area ACT which displays a picture on the innerside surrounded by the seal material SE. The active area ACT is formedof an approximately rectangular shape, and formed of a plurality ofpixels PX arranged in the shape of a matrix, for example.

The array substrate AR is equipped with a gate line G extending in afirst direction X, a source line S extending in a second direction Yorthogonally crossing the X direction so as to cross the gate line G, aswitching element SW connected with the gate line G and the source lineS, a pixel electrode PE connected with the switching element SW, etc.Although the counter substrate CT is equipped with a counter electrodeCE facing each of the pixel electrodes PE through the liquid crystallayer LQ, for example, the array substrate AR may be equipped with thecounter electrode CE.

In addition, explanation is omitted about the detailed structure of thedisplay panel PNL. In the modes such as TN (Twisted Nematic) mode, OCB(Optically Compensated Bend) mode, and VA (Vertical Aligned) mode whichmainly use vertical electric field, while the array substrate AR, isequipped with the pixel electrode PE, the counter substrate CT isequipped with the counter electrode CE. Moreover, the array substrate ARis equipped with the both of the pixel electrode PE and the counterelectrode CE in the modes which mainly use lateral electric field, suchas IPS (In-Plane Switching) mode and FFS (Fringe Field Switching) mode.

A signal source necessary to drive the display panels PNL, such as adriving IC chip 2 and a flexible printed circuit (FPC) substrate 3, ismounted in a circumference area PRP outside the active area ACT. In thisembodiment, the driving IC chip 2 and the FPC substrate 3 are mounted ina mounting portion MT of the array substrate AR which extends to outsidea substrate end CTE of the counter substrate CT. The circumference areaPRP is an area surrounding the active area ACT, and formed in the shapeof a rectangular frame including an area in which the seal material SEis arranged.

The illustrated display panel PNL is formed in the rectangular shape sothat a substrate end of the array substrate AR and a substrate end ofthe counter substrate CT overlap, and three ends form panel ends exceptfor the mounting portion MT. The seal material SE extends to the panelends in the three ends except for the mounting portion MT.

FIG. 2 is a cross-sectional view schematically showing a structure inthe circumference area PRP of the display panel PNL taken along line A-Bshown in FIG. 1.

The array substrate AR is formed using a transparent first insulatingsubstrates 10, such as a glass substrate and a resin substrate. Thearray substrate AR is equipped with a circumference wiring which is notshown and a first organic insulating film 11, etc., in the circumferencearea PRP on the first insulating substrate facing the counter substrateCT. In addition, although not illustrated, the array substrate AR isequipped with the switching element, the pixel electrode, an alignmentfilm, etc., in the active area ACT on the first insulating substrate 10facing the counter substrate CT. Moreover, in the circumference areaPRP, other insulating films may be arranged between the first insulatingsubstrate 10 and the first organic insulating film 11.

The first organic insulating film 11 extends not only to thecircumference area PRP but the active area ACT. In the circumferencearea PRP, the first organic insulating film 11 includes a first segment11A on a side close to the active area ACT and a second segment 11B on aside close to a substrate end 10E of the array substrate AR. The secondsegment 11B extends up to the substrate end 10E. In the illustratedexample, a first concave portion 11C is formed between the first segment11A and the second segment 11B in the first organic insulating film 11.The surfaces of the first segment 11A and the second segment 11B aresubstantially flat, respectively. The first concave portion 11C has adepth penetrating to the first insulating substrate 10, for example. Theorganic insulating film 11 is formed, for example, of a transparentresin material.

On the other hand, the counter substrate CT is formed using atransparent second insulating substrate 20, such as the glass substrateand the resin substrate. The counter substrate CT is equipped with acircumference shield layer 21, a circumference color filter 22, a secondorganic insulating film 23, etc., in the circumference area PRP on thesecond insulating substrate 20 so as to face the array substrate AR. Inaddition, although not illustrated, the counter substrate CT is equippedwith a black matrix, a color filter layer, an alignment film, etc., inthe active area ACT.

The circumference shield layer 21 is formed on the second insulatingsubstrate 20 facing the array substrate AR, and extends to substantiallywhole area of the circumference area PRP. That is, the circumferenceshield layer 21 is located above portions of the first segment 11A, thesecond segment 11B, and the first concave portion 11C, and formedcontinuously without breaking off up to a substrate end 20E of thecounter substrate CT. The circumference shield layer 21 has a constantfilm thickness. Moreover, the circumference shield layer 21 is formedwith the same material as the black matrix in the active area ACT, andconnected with the black matrix. The circumference shield layer 21 isformed of the resin material colored in black or light shielding metalmaterial such as chromium (Cr), etc.

The circumference color filter 22 is formed on the circumference shieldlayer 21. In the circumference area PRP, the circumference color filter22 includes a second segment 22B on a side close to the substrate end20E while including a first segment 22A on a side close to the activearea ACT. The second segment 22B extends up to the substrate end 20E. Inthe illustrated example, a second concave portion 22C is formed betweenthe first segment 22A and the second segment 22B in the circumferencecolor filter 22. The second concave portion 22C has a depth penetratingto the circumference shield layer 21, for example. The second concaveportion 22C is formed in a position which counters with the firstconcave portion 11C. The second concave portion 22C is formed so thatthe second concave portion 22C gradually spreads from a portionpenetrating up to the circumference shield layer 21 toward the arraysubstrate AR.

The color filter arranged in the active area ACT is formed of a redcolor filter arranged corresponding to a red pixel, a green color filterarranged corresponding to a green pixel and a blue color filter arrangedcorresponding to a blue pixel. The color filters are formed of the resinmaterial colored in red, green, blue, etc., respectively. Theabove-mentioned circumference color filter 22 is formed with the samematerial as one of the color filter layers arranged in the active areaACT. In this embodiment, the circumference color filter 22 is formedwith the same material as the blue color filter, for example.

The second organic insulating film 23 extends to not only thecircumference area PRP but the active area ACT. In the circumferencearea PRP, the second organic insulating film 23 covers the secondconcave portion 22C while covering the circumference color filter 22.That is, the second organic insulating film 23 covers the circumferenceshield layer 21 exposed by the second concave portion 22C while beinglaminated on the first segment 22A and the second segment 22B. In theillustrated example, a third concave portion 23C is formed in a positionwhich covers the second concave portion 22C in the second organicinsulating film 23. The surface of the second organic insulating film 23laminated on the first segment 22A and the second segment 22B issubstantially flat. The third concave portion 23C is formed so that thethird concave portion 23C gradually spreads from its bottom portiontoward the array substrate AR. The second organic insulating film 23 isformed of a transparent resin material, for example.

The display panel PNL is further equipped with a first spacer SP1 and asecond spacer SP2 in the circumference area PRP. Each of the first andsecond spacers SP1 and SP2 is arranged between the first organicinsulating film 11 and the second organic insulating film 23. The firstspacer SP1 is located on a side close to the active area ACT, and thesecond spacer SP2 is located on the substrate ends 10E, 20E side. In theillustrated example, the first spacer SP1 and second spacer SP2 areformed in the columnar shape in the array substrate AR. Precisely, thefirst spacer SP1 and second spacer SP2 are formed on the first organicinsulating film 11 in the shape of taping off toward the countersubstrate CT.

The height H1 of the first spacer SP1 is higher than the height I-I2 ofthe second space SP2. Therefore, while the tip portion of the firstspacer SP1 contacts the second organic insulating film 23, the tipportion of the second spacer SP2 is apart from the second organicinsulating film 23. That is, a clearance is formed between the secondspacer SP2 and the second organic insulating film 23.

In addition, the counter substrate CT may be equipped with each of thefirst spacer SP1 and the second spacer SP2. In this case, they areformed on the second organic insulating film 23, and formed in the shapeof tapering off toward the array substrate AR.

The seal material SE which attaches the array substrate AR and thecounter substrate CT are formed between the first organic insulatingfilm 11 the second organic insulating film 23. Moreover, the sealmaterial SE is filled in the first concave portion 11C and the thirdconcave portion 23C. Furthermore, the seal material SE is filled betweenthe second spacer SP2 and the second organic insulating film 23, andextends up to the position in which the substrate end 10E and thesubstrate end 20E overlap each other. That is, the seal material SE isexposed in the location in which the substrate end 10E and the substrateend 20E overlap. The first spacer SP1 is surrounded with the sealmaterial SE.

The liquid crystal layer LQ is enclosed inside the seal material SE(active area side).

FIG. 3 is a view showing a layout of the seal material SE, the firstspacer SP1 and the second spacer SP2 in the display panel PNL accordingto the embodiment. Here, only the principal portion required forexplanation is illustrated.

The seal material SE extends up to the substrate end 10E in the threesides of the array substrate AR except for the mounting portion MT. Thefirst spacer SP1 is located in the seal material SE, and formed in theshape of a dot. Although the illustrated example shows the case wherethe first spacers SP1 are formed in two lines, the layout andarrangement density of the first spacer SP1 are not restricted to thisexample. For example, it is possible to control the cell gap of thecircumference area PRP by adjusting the arrangement density of the firstspacer SP1. More specifically, since the seal material SE invadesbetween the first spacer SP1 and the counter substrate CT by arrangingthe first spacer SP1 densely, the attached substrate CT easily warpsupward. At this time, the density per unit area of the first spacer SP1located in the seal material SE is made larger than the density per unitarea of the spacer arranged in the exterior of the seal material SE,i.e., the active area ACT. According to such composition, the cell gapof the circumference area PRP becomes larger than the cell gap of theactive area ACT. The expansion of the cell gap which arose in thecircumference area PRP is utilizable as space which accommodates theexcessive liquid crystal material injected more than needed by One DropFill (ODF) method in the manufacturing process. That is, since a surplusliquid crystal material is accommodated by the space which is formed bywarping up of the counter substrate CT in the circumference area PRP,the thickness of the liquid crystal layer becomes uniform in the activearea ACT. Therefore, it becomes possible to achieve excellent anduniform display grace throughout the active area ACT. In three sidesexcept for the mounting portion MT, the second spacer SP2 is formed inthe shape of a straight line along the substrate end 10E. Theillustrated example shows the case where the second spacer SP2 is formedin the shape of a rectangular frame in which the second spacer SP2extends continuously. In addition, the form of the second spacer SP2 maybreak off in the middle without being restricted to this example.

Next, an example of a manufacturing method of the above-mentioneddisplay panel PNL is explained briefly.

First, a mother substrate which collectively forms a plurality of arraysubstrates AR is prepared. The first mother substrate is formed using aninsulating substrate which becomes the first insulating substrate, andequipped with various wirings, such as the gate line, the source line,the switching element, etc., and various insulating films such as theorganic insulating film, the pixel electrode, the alignment film, thefirst spacer, the second spacer, etc.

On the other hand, a second mother substrate which collectively forms aplurality of counter substrates CT is prepared. The second mothersubstrate is formed using an insulating substrate which becomes thesecond insulating substrate, and equipped with the black matrix, thecircumference shield layer, the circumference color filter, the colorfilter layer, the second organic insulating film, the second alignmentfilm, etc.

Then, after arranging the seal material on the first mother substrate orthe second mother substrate so that the seal material surrounds theactive area, the liquid crystal material is dropped on the inner sidesurrounded with the seal material. Successively, the first mothersubstrate and the second mother substrate are attached together.

Then, the display panels PNL are taken out from a pair of mothersubstrates, in which the liquid crystal layer is held between the firstmother substrate and the second mother substrate. In this process, theboth of the first mother substrate and the second mother substrate arecut along cutting lines, respectively. Thereby, the display panel PNLholding the liquid crystal layer LQ between the array substrate AR andthe counter substrate CT is manufactured.

FIG. 4 is a cross-sectional figure showing the cutting process forcutting down the pair of mother substrates.

As illustrated, in the first mother substrate M1, the second segment 11Bof the first organic insulating film 11 and second spacer SP2 are formedso as to stride over a cutting line CTL. In this process for preparingthe first mother substrate, the first concave portion 11C in the shapeof a slit is formed on the both sides of the second segment 11B. Then,when forming the first spacer SP1 and the second spacer SP2, a portionof the insulating material formed on the first organic insulating film11 flows into the first concave portion 11C. Accordingly the thicknessof the insulating material in a location sandwiched by the pair of thefirst concave portions 11C becomes thin. As a consequence, the height ofthe second spacer SP2 formed on the second segment 11B becomes lowerthan the height of the first spacer SP1 formed on the first segment 11A.

On the other hand, in the second mother substrate M2, the circumferenceshield layer 21, the second segment 22B of the circumference colorfilter 22 and the second organic insulating film 23 are formed so as tostride over the cutting line CTL.

In the cells arranged on the both sides sandwiching the cutting lineCTL, the first mother substrate M1 and the second mother substrate M2 ineach cell are attached after the seal material SE is applied.Accordingly, the seal material SE spreads and also extends between thesecond spacer SP2 and the second organic insulating films 23, and theseal material SE applied to the respective regions are connected eachother.

The blade of the cutting element used in the cutting process is pressedto respective cutting lines CTL of the first mother substrate M1 and thesecond mother substrate M2. The pressure from the cutting element istransferred to the first mother substrate M1 and the second mothersubstrate M2. Accordingly, the crack is developed, and the mothersubstrates are cut along the cutting line CTL. Thereby, the displaypanels PNL holding the liquid crystal layer LQ between the arraysubstrate AR and the counter substrate CT are manufactured.

According to the embodiment, the seal material SE extends up to alocation in which the substrate end 10E of the array substrate ARoverlap the substrate end 20E of the counter substrate CT. That is, whencutting down the array substrates AR from the first mother glass M1 andthe counter substrates CT from the second mother substrate M2, the sealmaterial SE is arranged along the cutting line.

In recent years, the demand for the narrow frame with a short distancebetween the active area ACT and the substrate ends 10E and 20E isincreasing. For this reason, we are anxious about the variation in thecutting accuracy resulted from formation accuracy of the seal materialSE. However, since the spreading resistance of the seal material SE isreduced, the seal material SE easily spreads up to the substrate ends10E and 20E. Thereby, it becomes possible to reduce the variation in theformation accuracy of the seal material SE, and to reduce the variationin the cutting accuracy resulted from the formation accuracy of the sealmaterial SE. Accordingly, it becomes possible to control the fall of themanufacturing yield.

Moreover, since the seal material SE is filled up not only between thefirst organic insulating film 11 and the second organic insulating film23 but also in the first concave portion 11C and the third concaveportion 23C, it becomes possible to increase the amount of the appliedseal material SE. Further, it becomes possible to increase the areas ofthe array substrate and the counter substrate, in which the sealmaterial SE contacts, respectively. For this reason, it becomes possibleto improve adhesive strength to attach the array substrate AR and thecounter substrate CT by the seal material SE.

Moreover, it becomes possible to adjust invaded seal amount SE betweenthe substrate and the first spacer SP1 by adjusting the arrangementdensity of the first spacer SP1 located in the seal material SE, andthereby the cell gap in the circumference area PRP. For example, theattached counter substrate CT warps upward by adjusting the arrangementdensity of the first spacer SP1. Accordingly, it becomes possible tomake the cell gap of the circumference area PRP larger than that of theactive area ACT. Since surplus liquid crystal material is accommodatedby the space which is formed by the warping up of the counter substrateCT in the circumference area PRP, the thickness of the liquid crystallayer in the active area ACT becomes uniform. Therefore, it becomespossible to achieve excellent and uniform display grace throughout theactive area ACT.

As explained above, according to the embodiment, the liquid crystaldisplay device which can control decrease of manufacturing yield can besupplied.

While certain embodiments have been described, these embodiments havebeen presented by way of example only, and are not intended to limit thescope of the inventions. In practice, the structural and method elementscan be modified without departing from the spirit of the invention.Various embodiments can be made by properly combining the structural andmethod elements disclosed in the embodiments. For example, somestructural and method elements may be omitted from all the structuraland method elements disclosed in the embodiments. Furthermore, thestructural and method elements in different embodiments may properly becombined. The accompanying claims and their equivalents are intended tocover such forms or modifications as would fall with the scope of theinventions.

1. (canceled)
 2. A liquid crystal display device, comprising: a firstsubstrate including, a first insulating substrate, and a first organicinsulating film including a first concave portion and arranged on thefirst insulating substrate in a circumference area outside an activearea for displaying images; a second substrate including, a secondinsulating substrate, a light shield layer arranged on the secondinsulating substrate facing the first substrate in the circumferencearea, a first color filter and a second color filter which are arrangedon the light shield layer facing the first substrate, and a secondorganic insulating film covering the first color filter and the secondcolor filter; a seal material arranged between the first organicinsulating film and the second organic insulating film to attach thefirst substrate and the second substrate; a spacer arranged between thefirst organic insulating film and the second organic insulating film;and a liquid crystal layer held in a gap surrounded with the sealmaterial between the first substrate and the second substrate, whereinthe first color filter is separated from the second color filter, at aposition opposed to the first concave portion, the second organicinsulating film is in contact with the light shield layer between thefirst color filter and the second color filter, and the spacer overlapsthe second color filter, and is arranged closer to a first substrate endof the first insulating substrate than the first concave portion.
 3. Theliquid crystal display device according to claim 2, wherein the sealmaterial is arranged in the first concave portion.
 4. The liquid crystaldisplay device according to claim 2, wherein a thickness of the spaceris less than a thickness of the liquid crystal layer.
 5. The liquidcrystal display device according to claim 2, wherein the spacer includesa first side surface, a second side surface located closer to the firstsubstrate end than the first side surface, and a top surface, and theseal material covers the first side surface and the top surface, anddoes not cover the second side surface.
 6. The liquid crystal displaydevice according to claim 5, wherein the seal material includes a sealend located directly above the top surface.
 7. The liquid crystaldisplay device according to claim 2, wherein the first organicinsulating film includes a first portion located between the firstinsulating substrate and the first color filter, and a second portionlocated between the first insulating substrate and the second colorfilter and separated from the first portion, and the seal material isarranged between the first portion and the second portion.
 8. The liquidcrystal display device according to claim 2, wherein each of the firstcolor filter and the second color filter is a blue color filter.
 9. Theliquid crystal display device according to claim 2, wherein an intervalbetween the first color filter and the second color filter is largerthan a width of the first concave portion.
 10. The liquid crystaldisplay device according to claim 2, wherein a thickness of the spaceris larger than a thickness of the seal overlapping the spacer.
 11. Theliquid crystal display device according to claim 2, wherein the secondorganic insulating film has a first thickness at a position where thesecond organic insulating film overlaps the first color filter, and asecond thickness between the first color filter and the second colorfilter, and the first thickness is different from the second thickness.